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Finding the Fourth Proportional to 103,638.58, 155,434.65 and 40,460.20

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Solution

The fourth proportional to 103,638.58, 155,434.65 and 40,460.20 is: 60,681.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.58 : 155,434.65 = 40,460.20 : x
  2. Step 2: Convert to fraction form
    103,638.58/155,434.65 = 40,460.20/x
  3. Step 3: Cross multiply
    103,638.58x = 155,434.65 × 40,460.20
  4. Step 4: Simplify right side
    103,638.58x = 6,288,917,025.93
  5. Step 5: Solve for x
    x = 6,288,917,025.93/103,638.58
  6. Step 6: Final answer
    x = 60,681.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.